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This document describes the procedure for installing a direct current (DC) RRU3642 (referred
to as RRU in this document). RRU is short for remote radio unit.
Product Version
The following table lists the product version related to this document.
Product Name Product Version
DBS3900 V400
Intended Audience
This document is intended for:
z
Base station installation engineers
Organization
1 Changes in the RRU3642 Installation Guide
This chapter describes changes in the RRU3642 Installation Guide.
2 Installation Preparations
Before the installation, you must obtain all reference documents and required tools and
instruments, and have been trained on installation skills.
3 Information About the Installation
Before installing an RRU, you must be familiar with its exterior, ports, installation options,
physical supports, and installation clearance requirements.
4 Unpacking the Equipment
Unpack and check the delivered equipment to ensure that all the materials are included and
intact.
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The installation process involves installing an RRU and RRU cables, checking the RRU
hardware installation, and powering on the RRU.
6 Installing the RRU
This chapter describes the procedure for installing the RRU. The RRU can be installed on a
pole, U-steel, angle steel, or wall. The procedure for installing the RRU varies depending on
installation options.
7 Installing RRU Cables
This section describes the procedures for installing remote radio unit (RRU) cables.
8 Checking the RRU Hardware Installation
After an RRU is installed, check the hardware installation.
9 Powering On an RRU
After all the devices are installed, check the power-on status of an RRU.
10 Appendix
This section describes the procedure for adding an easy power receptacle (pressfit type)
connector.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates a hazard with a high level of risk that, if not avoided,
will result in death or serious injury.
Indicates a hazard with a medium or low level of risk which, if
not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation that, if not avoided,
could cause equipment damage, data loss, and performance
degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save time.
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3.5 Installation Clearance Requirements of an RRU ............................................................................................ 15
3.5.1 Installation Clearance for a Single RRU ............................................................................................... 15
3.5.2 Installation Clearance for Multiple RRUs ............................................................................................. 17
3.5.3 Installation Spacing Between RRUs ..................................................................................................... 21
4 Unpacking the Equipment ........................................................................................................ 24
5 Installation Process ..................................................................................................................... 26
6 Installing the RRU ...................................................................................................................... 27
6.1 Mounting Kits for an RRU ............................................................................................................................. 28
6.2 Installing the RRU on a Pole .......................................................................................................................... 29
6.2.1 Installing a Single RRU ........................................................................................................................ 31
6.2.2 Installing Two RRUs ............................................................................................................................. 33
6.3 Installing the RRU on U-steel ........................................................................................................................ 39
6.4 Installing the RRU on Angle Steel ................................................................................................................. 43
6.5 Installing the RRU on a Wall .......................................................................................................................... 46
6.6 Hoisting an RRU onto a Tower ...................................................................................................................... 50
7.3 Installation Process ......................................................................................................................................... 63
7.4 RRU Cable List .............................................................................................................................................. 64
7.5 Installing the RRU PGND Cable .................................................................................................................... 66
7.6 Installing an RRU RF Jumper ........................................................................................................................ 68
7.7 Installing an Inter-RRU RF Cable .................................................................................................................. 70
7.8 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable ........................................................ 71
7.9 Opening the Cover Plate of an RRU Cabling Cavity ..................................................................................... 73
7.10 Installing an RRU power cable .................................................................................................................... 75
7.11 Installing a CPRI Fiber Optic Cable ............................................................................................................. 77
7.12 Installing an RRU Alarm Cable .................................................................................................................... 79
7.13 Closing the Cover Plate of an RRU Cabling Cavity .................................................................................... 80
8 Checking the RRU Hardware Installation ............................................................................. 82
9 Powering On an RRU ................................................................................................................. 83
Before the installation, you must obtain all reference documents and required tools and
instruments, and have been trained on installation skills.
2.1 Reference Documents
Before the installation, you must familiarize yourself with the information in the following
documents:
2.2 Tools and Instruments
All tools and instruments required for RRU installation must be ready before the installation.
2.3 Skills and Requirements for Onsite Personnel
Onsite personnel must be qualified and trained. Before performing any operation, onsite
personnel must be familiar with correct operation methods and safety precautions.
2.1 Reference Documents
Before the installation, you must familiarize yourself with the information in the following
documents:
z
RRU3642 Hardware Description
z
RRU Hardware Maintenance Guide
z
DBS3900 Installation Guide
z
OCB User Guide
2.2 Tools and Instruments
All tools and instruments required for RRU installation must be ready before the installation.
Hammer drill (a φ 14 bit) ESD gloves Vacuum cleaner
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Capacity: 17 mm [0.67 in.],
21 mm [0.82 in.], and 32 mm
[1.26 in.]
Combination wrench
Capacity: 17 mm [0.67 in.],
21 mm [0.82 in.], and 32 mm
[1.26 in.]
Multimeter
Marker (diameter ≤ 10 mm
[0.39 in.])
Measuring tape
2.3 Skills and Requirements for Onsite Personnel
Onsite personnel must be qualified and trained. Before performing any operation, onsite
personnel must be familiar with correct operation methods and safety precautions.
Before the installation, pay attention to the following items:
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The customer's technical engineers must be trained by Huawei and be familiar with the
proper installation and operation methods.
z
The number of onsite personnel depends on the engineering schedule and installation
environment. Generally, only three to five onsite personnel are necessary.
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RRU3642
Installation Guide 3 Information About the Installation
3 Information About the Installation
About This Chapter
Before installing an RRU, you must be familiar with its exterior, ports, installation options,
physical supports, and installation clearance requirements.
3.1 RRU Exterior
This section describes the exterior and dimensions of an RRU.
3.2 RRU Ports
This section describes the ports on the remote radio unit (RRU) panels. An RRU has a bottom
panel, cabling cavity panel, and indicator panel.
3.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
3.4 Installation Options
This section describes RRU installation options. An RRU can be installed on a pole, U-steel,
angle steel, or wall.
3.5 Installation Clearance Requirements of an RRU
This section describes the requirements for the installation clearance of a single RRU and
multiple RRUs and the requirements for the installation spacing between RRUs.
3.1 RRU Exterior
This section describes the exterior and dimensions of an RRU.
Figure 3-1 shows an RRU.
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ANT_TX/RXA and
ANT_RXC ports and
combination of
ANT_TX/RXB and
ANT_RXD ports
8
RRU3642
Installation Guide 3 Information About the Installation
TX/RX Channel Number of RF Ports Combination of RF ports
2T2R channel 2 Combination of
ANT_TX/RXA and
ANT_TX/RXB ports
3.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
For detailed positions of RRU indicators, see RRU Ports.
Table 3-3 describes RRU indicators.
Table 3-3 RRU indicators
Label Color Status Description
RUN Green On There is power supply, but the module is
faulty.
Off There is no power supply, or the module is
faulty.
Blinking (on for
1s and off for 1s)
Blinking (on for
0.125s and off for
0.125s)
ALM Red On Alarms are generated, and the module must
Blinking (on for
1s and off for 1s)
Off No alarm is generated.
ACT Green On The module is working properly with TX
Blinking (on for
1s and off for 1s)
The module is working properly.
Software is being loaded to the module, or
the module is not started.
be replaced.
Alarms are generated. The alarms may be
caused by the faults on the related boards or
ports. Therefore, the necessity for module
replacement is uncertain.
channels enabled.
The module is working properly with TX
channels disabled.
VSWR Red Off No VSWR alarm is generated.
Blinking (on for
1s and off for 1s)
On VSWR alarms are generated on the
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RRU3642
Installation Guide 3 Information About the Installation
Label Color Status Description
CPRI0/IR0 Red and
green
CPRI1/IR1 Red and
green
Blinking (on for
0.125s and off for
0.125s)
Steady green The CPRI link is available.
Steady red An optical module fails to transmit or
Blinking red (on
for 1s and off for
1s)
Off The SFP module is not properly installed,
Steady green The CPRI link is available.
Steady red An optical module fails to transmit or
Blinking red (on
for 1s and off for
1s)
VSWR alarms are generated on the
ANT_TX/RXA and ANT_TX/RXB ports.
receive signals because the optical module
is faulty or the fiber optic cable is broken.
The CPRI link is out of lock because of
mutual lock of dual-mode clock sources or
mismatched data rates over CPRI ports
(you are advised to check the system
configuration to identify the fault).
or the optical module is powered off.
receive signals because the optical module
is faulty or the fiber optic cable is broken.
The CPRI link is out of lock because of
mutual lock of dual-mode clock sources or
mismatched data rates over CPRI ports
(you are advised to check the system
configuration to identify the fault).
3.4 Installation Options
This section describes RRU installation options. An RRU can be installed on a pole, U-steel,
angle steel, or wall.
Installing an RRU on a Pole
Figure 3-4 shows the diameter of pole for installing an AAU3801.
Off The SFP module is not properly installed,
or the optical module is powered off.
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RRU3642
Installation Guide 3 Information About the Installation
Figure 3-4 Diameter of a pole
z
The diameter of a pole for installing an RRU ranges from 60 mm (2.36 in.) to 114 mm
(4.49 in.). The recommended diameter is 80 mm (3.15 in.).
z
If the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum of
two RRUs can be installed on the pole and the side-mounted installation is not
recommended.
Figure 3-5 shows an RRU installed on a pole.
Figure 3-5 RRU installed on a pole
Installing an RRU on U-steel
Figure 3-6 shows U-steel specifications.
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RRU3642
Installation Guide 3 Information About the Installation
Figure 3-12 RRU installed on a wall
3.5 Installation Clearance Requirements of an RRU
This section describes the requirements for the installation clearance of a single RRU and
multiple RRUs and the requirements for the installation spacing between RRUs.
The recommended installation clearance ensures normal running and provides an appropriate space for
Operation and Maintenance (O&M). If there is sufficient space, leave the recommended installation
clearance.
The minimum installation clearance ensures normal running and heat dissipation, but OM activities such
as checking indicator status and opening the maintenance cavity cannot be properly conducted. If the
installation space is restricted, leave the minimum installation clearance.
3.5.1 Installation Clearance for a Single RRU
This section describes the recommended and minimum installation clearance for a single
RRU.
Recommended Installation Clearance for a Single RRU
Figure 3-13 shows the recommended installation clearance for a single RRU.
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